Miscellaneous MCQ on Science for competitive exams
Test series no. 5
1. Which of the following has least value of ‘packing efficiency’?
(A) Body centred cube
(B) Simple cube
(C) Closed packed hexagonal
(D) All of the above
2. Which of the following animal is unisexual?
(A) Tapeworm
(B) Leech
(C) Cockroach
(D) Earthworm
3. The ore of aluminium ‘bauxite’
(A) Al2O3
(B) Al2O3.H2O
(C) Al2O3.2H2O
(D) None of the above
4. In linear simple harmonic motion of a particle, at the extreme position of particle
(A) both velocity and acceleration are maximum
(B) both velocity and acceleration are minimum
(C) velocity is maximum and acceleration is minimum
(D) velocity is minimum and acceleration is maximum
5. Chromatographic separation of substances from a mixture depends on the basis of which of the following?
(A) Their solubilities in the same solvent
(B) The difference in their volatilities
(C) Their different colours under similar conditions
(D) The different extent of their adsorption by same material
6. A bullet is fired from a gun. The force on bullet is given by F = 600 − 2 × 105 t, where F is in Newton and t is in seconds. The force on the bullet is reduced to zero as soon as it leaves the barrel. The average impulse imparted to bullet is
(A) 0
(B) 0.9 Ns
(C) 1.8 Ns
(D) 9.0Ns
7. A nucleus is present in:
(A) Amoeba
(B) Bacteria
(C) Blue-green algae
(D) Plasma
8. The moon would depart from the gravitational field of earth forever, if its speed increased nearly by
(A) 4%
(B) 14%
(C) 24%
(D) 42%
9. In linear simple harmonic motion of a particle at mean position
(A) velocity is maximum and acceleration is minimum
(B) velocity is minimum and acceleration is maximum
(C) both velocity and acceleration are maximum
(D) None of the above
10. Which option is correct about the specific heat of a gas?
(1) It has any positive value from zero to infinity.
(2) It may have negative value.
(3) Its exact value depends on mode of heating of gas.
(A) Option (1) is correct
(B) Option (2) and (3) are correct
(C) Option (1) and (3) are correct
(D) All Options are correct
11. With what acceleration should a box descend so that a block of mass M, placed in it exerts force mg/4 on the floor of the box?
(A) g/4
(B) g/2
(C) 3g/4
(D) 4g/5
12. Which of the following is not used as artificial sweetener?
(A) Aspartame
(B) Saccharin
(C) Norethindrone
(D) Sucralose
13. Metazoan without tissue grade organization are called
(A) Protozoa
(B) Parazoa
(C) Deuterostomia
(D) Eumetazoa
14. The endosperm in gymnosperms is
(A) Diploid
(B) Haploid
(C) Triploid
(D) None of the above
15. Ribosomes are formed of the following
(A) DNA and RNA
(B) RNA and Protein
(C) DNA and Protein
(D) RNA and Amino acids
16. Which of the following is an example of a ‘higher plant’?
(A) Lichen
(B) Peziza
(C) Ephedra
(D) All of the above
17. Match the following Metal with method of extraction.
Metal Method of extraction
(i) Aluminium (a) Electrolysis of oxide dissolved in molten cryolite
(ii) Iron (b) Roasting followed by reduction with coke
(iii) Copper (c) Roasting of sulphide partially and reduction
(iv) Zinc (d) Reduction of the oxide with CO and coke in blast furnace
(A) (i)-(a) (ii)-(b) (iii)-(c) (iv)-(d)
(B) (i)-(a) (ii)-(d) (iii)-(c) (iv)-(b)
(C) (i)-(c) (ii)-(a) (iii)-(d) (iv)-(b)
(D) None of the above
18. In which stage are chromatids clearly visible in meiosis?
(A) Zygotene
(B) Pachytene
(C) Diakinesis
(D) Diplotene
19. Osmoregulation in Amoeba takes place by………….
(A) Plasma
(B) Food Vacuole
(C) Contractile Vacuole
(D) Plasmalemma
20. Which among the following is strongest base in gas phase?
(A) Triethylamine
(B) Diethylamine
(C) Ethylamine
(D) Ammonia
21. Elimination of HBr from 2-bromobutane results in the formation of
(A) Equimolar mixture of 1- and 2-butene
(B) Predominantly 2-butene
(C) Predominantly 1-butane
(D) Predominantly 2-butene
22. The true stem of which of the following plant is underground?
(A) Banana
(B) Bamboo
(C) Sugarcane
(D) Flower
23. In the weightlessness state, bodies ………………..
(A) have no weight, no inertia
(B) have no weight, but posses inertia
(C) have weight, but don’t posses inertia
(D) have weight, have inertia
24. In which of the following plants root is the food storage organ?
(A) Sweet Potato
(B) Potato
(C) Ginger
(D) Garlic
25. Which one of the following is a nonsense codon in universal code?
(A) UAG
(B) UGC
(C) UGG
(D) UAC
26. Two light sources are said to be coherent if they emit….
(A) light of same intensity
(B) waves having constant phase difference
(C) waves of same velocity
(D) Same frequency
27. When a Silk cloth is rubbed with a glass rod, the rod …..
(A) becomes negative charged while the cloth is positive charged.
(B) and the cloths acquires positive charge.
(C) becomes positive charged while the cloth is negatively charged
(D) and the cloth acquires negative charge.
28. The four quantum numbers of the valence electron of potassium atom are……
(A) 4, 0, −1, 1/2
(B) 4, 1, 0, 1/2
(C) 4, 0, 0, 1/2
(D) 4, 1, 1, −1/2
29. All fungi are …………..
(A) Holotrophs
(B) Saprotrophs
(C) Heterotrophs
(D) Azotrophs
30. Which of the following statements for the formation of ionic bond is correct?
(a) small cation, large anion
(b) low IP of cation, high EA of anion
(c) large cation, small anion and less charge
(d) less lattice energy
(A) Option (b) and (c)
(B) Option (a)and (b)
(C) Option (d) and (b)
(D) Option (a), (b) and (c)
31. Biological Oxygen Demand (B.O.D) is connected with…..
(A) Organic matter
(B) Microbes
(C) Microbes and Organic matter
(D) None of the above
32. Which one of the following phylum having animal with radial symmetry?
(A) Platyhelminthes
(B) Arthropoda
(C) Both (A) and (B)
(D) Echinodermata
33. Which one of the following options is an example of Analogy?
(A) Wings of birds and bat
(B) Hand of man and leg of horse
(C) Mouth parts of honeybee and housefly
(D) All of the above
34. Which of the following is not a Fossil Fuel?
(A) CNG and Coal
(B) Petroleum
(C) Wood
(D) Diesel
35. The placenta in human is …………..
(A) Haemochorial
(B) Epitheliochorial
(C) Syndesmochorial
(D) None of the above
36. Which of the following sources gives best monochromatic light?
(A) A Bulb (ordinary)
(B) A LED Bulb
(C) A Mercury Tube
(D) A Laser
37. Which of the following statements is/are correct?
(a) PMMA is used in making eye lenses.
(b) Nylon-66 is manufactured by caprolactam.
(c) Nylon is the step growth polymer.
(d) Vulcanisation was introduced by Charles Goodyear.
(A) (a), (b) and (c) are correct
(B) (a), (c) and (d) are correct
(C) (b), (c) and (d) are correct
(D) (a), (b) and (d) are correct
38. Term used for pollination which takes place in closed flowers is……….
(A) Cleistogamy
(B) Herkogamy
(C) Dichogamy
(D) Allogamy
39. Acrosome of sperm is formed from which part of spermatid?
(A) Centrosome
(B) Golgi body
(C) Mitochondria
(D) Ribosome
40. Till 2006 there were Nine planets in the solar system. Now their are only Eight planets in the solar system. Out of these planets, which planet is not a member of solar system now ?
(A) Pluto
(B) Neptune
(C) Saturn
(D) Uranus
41. Kranz anatomy is observed in…….
(A) C2 plants
(B) C4 plants
(C) CAM plants
(D) C3 plants
42. Bacteria differs from mycoplasma in having……
(A) Nucleoides
(B) Plasma membrane
(C) Rigid cell wall
(D) All of the above
43. Which of the following is not a bast fiber?
(A) Coir
(B) Jute
(C) Hemp
(D) Flax
44. Choose the correct descending sequence of the following taxonomic categories using the codes given below.
(A) Genus (B) Order (C) Class (E) Family (3) CBEAD (D) Species
(A) ECBDA
(B) EBCAD
(C) CBEAD
(D) ABCDE
45. A convex lens forms a real image of a point object placed on its principal axis. If the upper half of the lens is painted black, then
(A) the image will be shifted downwards.
(B) the image will be shifted upwards.
(C) the image will not be shifted.
(D) None of the above
46. Phytochrome is related to……
(A) Photophosphorylation
(B) Photoperiodism
(C) Climacteric effect
(D) Photorespiration
47. In an angiosperm the ‘free nuclear division’ takes place during the formation of which of the following?
(A) Embryo
(B) Endosperm
(C) Flower
(D) Gametes
48. Taxonomic studies based on DNA are part of……….
(A) Karyo taxonomy
(B) Chemo taxonomy
(C) Cyto taxonomy
(D) Alpha taxonomy
49. Development of gametophyte directly from the vegetative cells of the sporophyte without the formation of spores is known as
(A) Apospory
(B) Apogamy
(C) Parthenogenesis
(D) Xenia
50. A biofertilizer that is used in paddy fields is …..
(A) Azolla pinnata
(2) Bacillus thuringiensis
(3) Rhizobium meliloti
(4) Thermus aquaticus
51. Neoprene is prepared by polymerization of which of the following?
(A) 2-chloro-1,3-butadiene
(B) 2-methyl-1,3-butadiene
(C) 1, 3-butadiene
(D) None of the above
52. How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
(A) 3
(B) 4
(C) 8
(D) 2
53. Electromagnetic waves are transverse in nature is evident by……
(A) Reflection
(B) Polarization
(C) Interference
(D) Diffraction
54. Which of the following term is used for the evolutionary history of a particular group of organisms?
(A) Palynology
(B) Paleobotany
(C) Phylogeny
(D) Ontogeny
55. Which of the following is carbonate ore of zinc?
(A) Zinc blende
(B) Calamine
(C) Zincite
(D) Sphalerite
56. The structural and functional unit of life, the cell, was discovered by…………
(A) Robert Koch
(B) Robert Hook
(C) Charles Darwin
(D) Robert Wart
57. Deficiency of which of the following Vitamins causes pernicious anaemia?
(A) Vitamin K
(B) Vitamin E
(C) Vitamin B12
(D) Vitamin B6
58. Which of the following molecule has highest dipole moment?
(A) NF3
(B) BF3
(C) NH3
(D) CCL4
59. Which of the following plant is a dicot?
(A) Bamboo
(B) Wheat
(C) Parthenium (Congress Grass)
(D) Banana
60. Which of the following option is incorrect?
(1) Fibroblasts store food in adipose tissue.
(2) Nissl’s granules are found in the granulocytes.
(3) Blood platelets are formed from Macrophages.
(4) Serum globulin acts as an antibody.
(A) 1, 2 and 3
(B) 1, 2 and 4
(C) 1 and 4
(D) 2 and 3
61. One horned Rhinoceros is conserved species at…………….
(A) Rajiv Gandhi National Park
(B) Corbett Park
(C) Kaziranga National Park
(D) Anashi National Park
62. Chlorophyll is absent in
(A) Lichen
(B) Algae
(C) Bryophytes
(D) Fungi
63. Which of the following class of Arthropoda have animals with two pairs of antennae and green glands?
(A) Crustacea
(B) Chilipoda
(C) Insects
(D) Arachnida
64. Food storing plant part in onion is ……..
(A) Root
(B) Stem
(C) Leaves
(D) Fruit
65. Malaria is caused by …..
(A) Plasmodium
(B) Female Anopheles mosquito
(C) Culex mosquito
(D) Virus
66. The rice water turns blue-black on addition of a few drops of iodine solution. This indicates the presence of ……
(A) Fats
(B) Cholesterol
(C) Complex proteins
(D) Starch
67. Negative geotropic roots of mangrove plants are ……
(A) Coralloid roots
(B) Assimilatory roots
(C) Hygroscopic roots
(D) Pneumatophores
68. The non-living part of a tomato cell is its …..
(A) Chloroplast
(B) Nucleus
(C) Cell membrane
(D) Cell wall
69. The resistivity of the conductor wire depends on …..
(A) Length of conductor wire
(B) Cross section area of conductor wire
(C) Nature of material of conductor wire and temperature of conductor wire
(D) None of the above
70. Which of the following is not a common component of photo chemical smog?
(1) Peroxyacetyl nitrate
(2) 3 O
(3) Nitric oxide
(4) CFC’s
(A) Option (1)
(B) Option (2) and (3)
(C) Option (3) and (4)
(D) Option (4)
71. How far below the Earth’s level will the value of gravitational acceleration be half of the gravitational acceleration on the Earth’s surface? (Radius of Earth 6400 km).
(A) 6400 KM
(B) 3200 KM
(C) 1800 KM
(D) 800 KM
72. When light is incident a metallic surface, the maximum kinetic energy of emitted photo-electron depends on ………
(A) Velocity of incident light
(B) Intensity of incident light
(C) Frequency of incident light
(D) The time interval for which light is incident on metal
73. Lenz law is consequence of the law of conservation of …..
(A) Mass
(B) Energy
(C) Charge
(D) None of the above
74. During inelastic collision between two bodies, which of the following quantities always remain conserved?
(A) Kinetic Energy
(B) Mechanical Energy
(C) Linear Momentum
(D) Both Kinetic energy and Linear Momentum
75. Urea is excreted by….
(A) Frog (Adult)
(B) Star Fish
(C) Land snails
(D) Hydra
76. What will be the correct gene expression pathway?
(A) Gene → translation → m-RNA → transcription → protein
(B) Gene → transcription → m RNA → translation → protein
(C) Gene → m-RNA → transcription → translation → protein
(D) None of the above
77. Which of the following is true about prokaryotic cells?
1. Replication of DNA occurs in cytoplasm.
2. Some of them are capable of nitrogen fixation.
3. Plasmids do not occur in prokaryotic cell.
4. Organic compounds can be produced by some of them from inorganic precursors.
(A) 1, 2 and 4
(B) 1 and 3
(C) 3 and 4
(D) All are incorrect
78. If the radius of the earth becomes three times, then what should be the change in density so that the value of ‘g’ does not change?
(A) Density becomes three times
(B) Density becomes one third
(C) Density becomes double
(D) Density reduced to half
79. A metallic rod when placed in strong magnetic field, aligns itself at right angles to the magnetic field. The nature of material is
(A) Diamagnetic
(B) Paramagnetic
(C) Ferromagnetic
(D) Can be Ferromagnetic
80. Mode of respiration in mollusca is…….
Choose the correct option
a. Buccal respiration
b. Bronchial
c. Pulmonary
(A) only a and c
(B) Only b and a
(C) Only b and c
(D) a, b and c
81. A student studies that a soap molecule has two ends, one of which is an ionic end and the other is carbon chain. Which of the following option explains the interaction of soap molecule with oil?
(A) Ionic end of the soap interacts with the oil.
(B) The carbon chain interacts with oil.
(C) Carbon chain end of the soap interacts with the oil.
(D) Neither ionic end nor carbon. soap is made up from oil.
82. Rutherford’s α-particle scattering experiment shows that
(i) electrons have negative charge.
(ii) the mass and positive charge of the atom is concentrated in the nucleus.
(iii) neutron exists in the nucleus.
(iv) most of the space in atom is empty.
Which of the above statements are correct?
(A) (ii), (iii) and (iv)
(B) (ii) and (iv)
(C) (i), (ii) and (iv)
(D) (i) and (iii)
83. The amount of solute present per unit volume or per unit mass of the solution/solvent is known as…………………..
(A) Concentration of a solution
(B) Composition of a solvent
(C) Concentration of a solvent
(D) Composition of a solute
84. Which of the following are correctly matched?
1.Ray through centre of curvature – Retracting in mirrors
2. Refracted rays to infinity- Emergence through focus
3.Rays from infinite distance – Converges at focus
4. Ray through focus -Reflected parallel rays to principal axis
(A) 1, 2 and 3 are correctly matched
(B) 1, 2, and 4 are correctly matched
(C) All are correctly matched
(D) None of the above are correctly matched
85. Which of the following process is responsible for replacing and repairing tissues?
(A) Movement
(B) Mobility
(C) Cell division
(D) Growth
86. When vapour pressure of a liquid is equal to the atmospheric pressure, what happens to the liquid?
(A) The liquid boils
(B) The liquid freezes
(C) Becomes viscous
(D) Undergo no changes
87. Which of the following statement is correct?
(A) Material existing as liquids at room temperature have their melting and boiling points lower than that of room temperature.
(B) To convert a temperature on Celsius scale to Kelvin scale, subtract 273 from the given temperature.
(C) The density of ice is less than that of water.
(D) The process involving the transition of a substance from solid to liquid is called sublimation.
88. What is incorrect about the circulatory system of aves?
(A) Heart is four chambered.
(B) Well developed renal portal system.
(C) Sinus venosus and truncus arteriosus are lacking.
(D) R. B. Cs are nucleated
89. Where is the lower end of a lightning conductor fixed in the building?
(A) at the top
(B) at a window
(C) at the base floor
(D) inside the ground
90. Bipolar neurons are found in ……
(A) Cornea
(B) Lens
(C) Conjuctiva
(D) Retina
91. If the focal length of a magnifying glass is 2.5 cm, it can magnify an object
(A) 2.5 times
(B) 10 times
(C) 15 times
(D) 11 times
92. Biuret test is used to test the presence of……
(A) Fat
(B) Protein
(C) Nucleic Acid
(D) Carbohydrate
93. The mineral element present in a chlorophyll molecule is…….
(A) Molybdenum
(B) Manganese
(C) Magnesium
(D) Iron
94. Cow eat grass and (cow and grass)both have cells
Read the following statements regarding cells and choose the correct option.
(1) Cow cells are bigger than grass cells.
(2) Cow cells have plastids and small vacuoles.
(3) Grass cells have cell walls and vacuoles.
(4) Cow cells have cell membrane and mitochondria.
(A) option (1) and (3)
(B) option (4) and (5)
(C) option (1) and (2)
(D) option (3) and (4)
95. Parenchyma is the most abundant tissue in …………… that consist of thin-walled living cells that performs various functions.
(A) Animals body
(B) plants body
(C) Both A and B
(D) None of the above
96. Complete metamorphosis occurs in……………..
(A) Mosquitoes
(B) Bedbug
(C) Locust
(D) Silver fish
97. Which term is used for celestial bodies that revolve around the sun in highly elliptical orbit?
(A) Pluto
(B) Asteroids
(C) planets
(D) Comets
98. Lungs develops from……
(A) Endoderm
(B) Ectoderm
(C) Mesoderm
(D) Tissues and cells
99. Atomicity of phosphorus is………..
(A) 0
(B) 2
(C) 3
(D) 5
100. Which of the following is an example of a modified underground stem?
(A) Potato, Ginger, Turmeric
(B) Ginger, Groundnut, Peas
(C) Groundnuts, Sweet potato and Turmeric
(D) None of the above
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